With revised IPO pitch, Artiva touts ‘natural killer’ cell therapy for autoimmune disease

2024-07-01
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细胞疗法IPO免疫疗法临床2期
Dive Brief:
Two years after canceling an initial public offering, Artiva Biotherapeutics has filed a new proposal centered around plans to develop a donor-derived cell therapy for autoimmune disease.
The company originally registered for an IPO in April 2021 to support studies of a blood cancer treatment derived from “natural killer,” or NK cells. Eighteen months later, though, Artiva pulled the deal and instead formed a partnership with German biotechnology company Affimed to co-develop the therapy.
Artiva’s alliance with Affimed is ongoing. But a new IPO pitch revealed Friday includes a focus on autoimmune diseases, where Artiva claims to have been the first company cleared by U.S. regulators to bring a donor-derived, NK cell therapy to human testing. An early-stage study in lupus, as well as a “basket” trial in multiple inflammatory conditions, are ongoing. Initial results from the latter study are expected next year.
Dive Insight:
Like many of its cell therapy peers, Artiva reshuffled its strategy hoping to ride a recent wave of investor interest in autoimmune disease research.
The company is one of a number of biotechs to emerge in recent years to develop so-called allogeneic or “off-the-shelf” cell therapies, which are thought of as convenient, easier-to-manufacture alternatives to the personalized CAR-T treatments used on a handful of blood cancers. Unlike those therapies, Artiva’s are harvested from donor cells. They’re also made from NK cells, which have different characteristics than the immune cells involved in CAR-T therapy.
Such companies have struggled to stand out in cancer, though. Promising early results largely haven’t translated to the long-lasting remissions associated with CAR-T therapies. Personalized therapies have also proven themselves in earlier treatment settings, raising the bar for allogeneic cell therapy makers. Multiple publicly traded developers, like Allogene Therapeutics, Fate Therapeutics and Nkarta, have lost most of their market value and responded by changing course.
Those rearranged plans have often involved a foray into autoimmune disease. Cell therapies aren’t available for inflammatory conditions like lupus, but academic research has suggested they might have powerful, durable effects. About a dozen clinical trials have begun, and many more are on the way. Early data have shown potential, but also room for improvement.
A majority of those trials are testing personalized CAR-T treatments. Allogeneic developers are following closely behind, and contend the potential advantages of donor-derived therapies — like cheaper production costs and lower side effect rates — could be more important in autoimmune disease. In its IPO filing, Artiva pointed to possible edges in safety, scalability and cost.
Artiva also said in that filing that the early clinical results it accrued in cancer “provide a readthrough to autoimmune disease.” But it doesn’t yet have human data to back up those claims. In April, Artiva dosed its first patient in a study evaluating a combination of one of its treatments with a pair of antibody drugs in lupus nephritis. A second study is also underway enrolling people with a variety of conditions, such as rheumatoid arthritis and pemphigus vulgaris.
The lupus study has a primary completion date of 2026, according to a federal database.
Artiva still has a Phase 2 trial underway in lymphoma as part of its alliance with Affimed. The company additionally signed a cancer-focused deal with Merck & Co. in 2021, but, according to the IPO filing, Merck ended the partnership two years later.
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